Injection device



Dec. 6, 1927.

F. S. WOODROW INJECTION DEVICE Filed March 22. 1926 Qlw k S. H K 7 gwuewcoz W flbtovnw%laww Patented Dec. 6, 192?.

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FRANK S. WOOIDROW, 033 NEW YORK, Y.

INJECTION DEVICE.

Application filed March 22, 1926.

My invention relates to improvements in injecting devices, and more particularly has reference to a form of magazine dart adapted to be shot into the skin of an animal and thereby automatically injecting a liquid adapted to render the animal unconscious for a short period of time. The dart is adapted more particularly for use with an air pistol or rifle, and is especially adapted for the use of naturalists in procuring specimens of live animals.

Air guns, pistols, and rifles adapted to shoot such darts are generally well known, and therefore reference hereinafter will be made only to the form of dart adapted for the purpose stated.

In the accompanying drawings, I have illustrated in Fig. 1, upon an enlarged scale, in side elevation, a suitable form of dart em bodying an application of my invention. Fig. 2 is a longitudinal section of the same. Fig. 3 illustrates modifications.

3 indicates the entering portion or shell of a hollow dart which is preferably charged with formic acid, the virus of hornets, or other suitable liquid adapted when injected into the body to produce temporary paralysis, the same being indicated by reference character 11. Upon the circular ledge 4t,

within the dart is compressed the spiral spring 5, the other end of which is seated in the. piston 6, and 7 is a. circular depression adapted to form a seating for the piston on one side, and at the other side a seating for the hair 8 which may be glued in position or held by other suitable means. The point 9 of the dart is provided with a small hole through which the liquid is ejected after the dart has penetrated the skin, the impact of the dart causing the weighted piston 6 to travel toward the point of the dart against the action of the spring 5, which is compressed simultaneously with the ejection V of the fluid.

To prevent possible leakage of the fluid through the opening in the point of the dart, the point may be plugged with parafline wax, or other suitable material, to provide a stoppage in the point, as indicated at 10,

and the same will be readily discharged therefrom as the liquid is ejected. Of course, if desired, instead of parafiine wax, other suitable material may be used, and

may be rendered poisonous or medicated acscribed, a hollow shell terminating in a point,

Serial No. 96,437.

cording to requirements. and the fluid may be used only as a vehicle of injection. The particular material used for injecting will of course be varied according to the purposes and uses of the dart. For instance, for target practice, black ink or other suitable staining material may be used, so that when the target is struck at a distance, the mark will be plainly visible, and in fact, various other modifications may be made in the con struction and arrangement of parts, without departing from the spirit of the invention as claimed.

Referring more particularly to Fig. 3, it will be observed that the dart is provided with a hypodermic needle 12, the body port on 13 being hollow except for the virus or other liquid contained therein. Instead of the hair brush 8, as a tail to the dart, a plug 14;, slightly larger in diameter than the diameter of the shell 13, may be employed, preferably of soft metal, so as to engage the bore of the pistol or rifle, and if desired may be made of soft material, as upon impact of the dart it will be forced forwardly through the shell, thereby ejecting the fluid through the needle, and for that purpose, if desired,'the shell itself may be made of soft material adapted to yield to the passage of the plug 14. Darts such as shown in Fig. 3 may be. preferably for use upon animals having a thick fur or skin, or where other outer covering is to be penetrated, and for this purpose the needles and plugs may be made interchangeable and of difierent sizes, weight, proportion, etc, thereby adapting the darts for various uses.

Of course it will be understood that various modifications may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

I claim 2- 1. In an injecting device of the class described, a hollow shell terminating in a point, a hole through said point, and means in combination with said shell for controlling the same in flight, liquid within said shell adapted when injected into an animal to cause temporary paralysis, and means within said shell adapted to inject said liquid upon impact thereof.

2. In. an injecting device of the class dea hole through said point, and means in comin combination With said shell for controlbination with said shell for controlling the ling the same in flight, and a hypodermic same in'fiight, and a hy-podermie needle seneedle secured in said'h ole anda soft metal 10 cured in said hole. I plug secured in the other endfof saidsliell.

5 3. In an injecting device of the class, de- In testimony whereof I hereunto aifiix my scribed, a hollow shell terminating in a signature. point, a hole through said point, andineansl FRANJQ S. WVOODROW. 

